Hybrid organic/2D interfaces combine the wide spectrum of 2D material properties with the major advantages of organic materials, such as low cost, mechanical flexibility, and chemical tunability. Here, we report the electronic properties of cobalt phthalocyanine (CoPc) molecules adsorbed on molecular beam epitaxy-grown monolayer vanadium diselenide (VSe₂). Using scanning tunneling microscopy/spectroscopy, we provide evidence of highly ordered molecular assembly on monolayer VSe₂, with two distinctive bright and regular molecular contrasts, which are not observed on graphite. These contrasts also lead to a distinct difference in the electronic state of the molecule’s central Co atom, for which density functional theory calculations indicate the regular state as the ground state. A correlation between these two molecular states and the charged states of individual molecules is postulated, as demonstrated by the possibility of switching the bright state to the regular state using a negative tip voltage pulse.

混合有机/ 2D界面将2D材料的广泛特性与有机材料的主要优点结合在一起，例如低成本，机械柔韧性和化学可调性。在这里，我们报告吸附在分子束外延生长的单层二硒酸钒（VSe ₂）上的钴酞菁（CoPc）分子的电子性质。使用扫描隧道显微镜/光谱学，我们提供了在单层VSe ₂上高度有序的分子组装的证据，具有两个独特的明亮而规则的分子对比，这在石墨上是没有观察到的。这些对比还导致分子中心Co原子的电子态存在明显差异，为此，密度泛函理论计算将常规态表示为基态。假定这两个分子状态与单个分子的带电状态之间存在相关性，这可以通过使用负的尖端电压脉冲将亮状态切换为常规状态来证明。